windows: Remove more todos (#13818)

Release Notes:

- N/A

crates/gpui/src/platform/windows/events.rs

@@ -1259,7 +1259,7 @@ fn is_modifier(virtual_key: VIRTUAL_KEY) -> bool {
 }
 
 #[inline]
-fn current_modifiers() -> Modifiers {
+pub(crate) fn current_modifiers() -> Modifiers {
     Modifiers {
         control: is_virtual_key_pressed(VK_CONTROL),
         alt: is_virtual_key_pressed(VK_MENU),

crates/gpui/src/platform/windows/platform.rs

@@ -27,10 +27,7 @@ use windows::{
         System::{Com::*, LibraryLoader::*, Ole::*, SystemInformation::*, Threading::*, Time::*},
         UI::{Input::KeyboardAndMouse::*, Shell::*, WindowsAndMessaging::*},
     },
-    UI::{
+    UI::ViewManagement::UISettings,
-        Color,
-        ViewManagement::{UIColorType, UISettings},
-    },
 };
 
 use crate::*;
@@ -678,25 +675,6 @@ fn load_icon() -> Result<HICON> {
     Ok(HICON(handle.0))
 }
 
-// https://learn.microsoft.com/en-us/windows/apps/desktop/modernize/apply-windows-themes
-#[inline]
-fn system_appearance() -> Result<WindowAppearance> {
-    let ui_settings = UISettings::new()?;
-    let foreground_color = ui_settings.GetColorValue(UIColorType::Foreground)?;
-    // If the foreground is light, then is_color_light will evaluate to true,
-    // meaning Dark mode is enabled.
-    if is_color_light(&foreground_color) {
-        Ok(WindowAppearance::Dark)
-    } else {
-        Ok(WindowAppearance::Light)
-    }
-}
-
-#[inline(always)]
-fn is_color_light(color: &Color) -> bool {
-    ((5 * color.G as u32) + (2 * color.R as u32) + color.B as u32) > (8 * 128)
-}
-
 #[inline]
 fn should_auto_hide_scrollbars() -> Result<bool> {
     let ui_settings = UISettings::new()?;

crates/gpui/src/platform/windows/util.rs

@@ -1,7 +1,13 @@
 use std::sync::OnceLock;
 
 use ::util::ResultExt;
-use windows::Win32::{Foundation::*, UI::WindowsAndMessaging::*};
+use windows::{
+    Win32::{Foundation::*, UI::WindowsAndMessaging::*},
+    UI::{
+        Color,
+        ViewManagement::{UIColorType, UISettings},
+    },
+};
 
 use crate::*;
 
@@ -118,3 +124,22 @@ pub(crate) fn logical_point(x: f32, y: f32, scale_factor: f32) -> Point<Pixels>
         y: px(y / scale_factor),
     }
 }
+
+// https://learn.microsoft.com/en-us/windows/apps/desktop/modernize/apply-windows-themes
+#[inline]
+pub(crate) fn system_appearance() -> Result<WindowAppearance> {
+    let ui_settings = UISettings::new()?;
+    let foreground_color = ui_settings.GetColorValue(UIColorType::Foreground)?;
+    // If the foreground is light, then is_color_light will evaluate to true,
+    // meaning Dark mode is enabled.
+    if is_color_light(&foreground_color) {
+        Ok(WindowAppearance::Dark)
+    } else {
+        Ok(WindowAppearance::Light)
+    }
+}
+
+#[inline(always)]
+fn is_color_light(color: &Color) -> bool {
+    ((5 * color.G as u32) + (2 * color.R as u32) + color.B as u32) > (8 * 128)
+}

crates/gpui/src/platform/windows/window.rs

@@ -383,9 +383,8 @@ impl PlatformWindow for WindowsWindow {
         self.0.state.borrow().scale_factor
     }
 
-    // todo(windows)
     fn appearance(&self) -> WindowAppearance {
-        WindowAppearance::Dark
+        system_appearance().log_err().unwrap_or_default()
     }
 
     fn display(&self) -> Option<Rc<dyn PlatformDisplay>> {
@@ -405,9 +404,8 @@ impl PlatformWindow for WindowsWindow {
         logical_point(point.x as f32, point.y as f32, scale_factor)
     }
 
-    // todo(windows)
     fn modifiers(&self) -> Modifiers {
-        Modifiers::none()
+        current_modifiers()
     }
 
     fn set_input_handler(&mut self, input_handler: PlatformInputHandler) {